Apparatus for determining dust and moisture in gases.



l 1 L. A. TOUZALIN.

APPARATUS FOR DETBRMINING DUST AND MOISTURE IN GA SES.

APPLIUATION FILED FEB.23, 1909.

Patented Feb. 14, 1911.

LESLIE A. TOUZALIN, OF C HICAGO, ILLINOIS.

APPARATUS FOR DETERMINING DUST AND MOISTURE IN GASES.

Specification of Letters Illatent,`

Patented Feb. 111, 1911.

Application filed February 23, 1909. Serial` No. 479,631.

To all whom it may concern:

lle it known that I, LESLIE A. ToUziLm, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Apparatus for Determining Dust and Moisture in Gases, of which the following is a. description.

My invention belongs to that class of devices known as filters or the like and more particularly a device or piece of apparatus especially adapted for use in thc analysis of gas or the like in determining the percentage of dirt or dust. in the sample of gas filtered. The preferred arrangement affords means for determining both the percentage of dirt or dust and the moisture. It should be distinctly understood however, that the device as shown or a part thereof maybe used wherever it may be found applicable.

My invention has for its object the pro'- duction of a simple, convenient and more efficient and satisfactory device of the kind described at a comparatively low cost for use wherever applicable.

To this end my invention lconsists in the novel construction, arrangement and combination of `parts herein shown and described and more particularly pointed outin the claims.

ln the drawings .wherein like reference characters indicate like or corresponding parts, Figure 1 is a longitudinal sectional viewof my preferred form of filter and apparatus, Fig. 2 is a cross sectional view of the filter taken substantially on line 2-2 of Fig. 1, Fig. 3 is a view in elevationillustrating the preferred arrangement of the apparatus when in operation, and Fig. L1 is a perspective view of a. heating unit.

Referring to the drawings, the device comprises a shell 1 of suitable material, preferably brass or equivalent metal, of any suitable or desired shape, provided with an inlet and outlet. Within the shell 1 is arranged a suitable filtering medium, preferably a substantially cup-shaped shell of filtering paper or the equivalent, the sizes of the two shells relative to each other being such that there will be a space Il therebetween. As shown the shell 3 is arranged within the shell 1 with the open end at the inlet thereof. In the preferred construe tion the device is arranged to be secured on the sampling pipe S or its equivalent in such a wayv that the filtering medium 3 will act together. and before reaching the filtering medium 3 as its own washer avoiding the necessity of using an auxiliary washer that may become worn or disarranged. The construction shown comprises a part 2, removable from the shell 1 and arranged to be positioned substantially within the inlet thereof, adapted to be screwed or secured on the sampling pipe S and connect the shell 1 thereto. The two parts. are, preferably provided with correspondingly tapered faces 5 and 6, the proportions being such that when the shell 3 is positioned substantially as shown in Fig. 1 and parts 1 and 2 forced together the edge 31 will act as a ,washer thereby avoiding the usc of rubber washers 'or gaskets or the equivalent.. 'Any suitable means may be employed' to hold the parts 1 and 2 together or prevent the separation of the same, a part 7 arranged to engage the parts being a very simple and ysatisfactory means for accomplishing that end. As shown the part 2 is provided with threads so that the same may be screwed upon'the sampling pipe or tube 8 or its equivalent, the inner surface of the tube 8 and part 2 being Hush as at .9. To facilitate the removal or separation of the shells 1 and 3 the interior of shell 1 is preferably of the apparatus is'adapted to remove the dust or dirt from the passing gas.

The apparatus as shown is arranged for the determination of the moisture in the gas sampled,- however, if the moisture is not to be determined the nozzle 12 may be connected or arranged on the shell 1 and connected/by a tube 14 or its equivalent with a suitable meter 15. lVhen the percentage of moisture is also desired however, one or more receptacles or tubes 10 or the equivalent containing a suitable dehydrating agent 11 such as calcium chlorid or the equivalent may be arranged between the nozzle 12 and rounded as at 17. This part f equivalent means being provided for connecting the parts.v

lVhen it is desired to use the apparatus, for example, to make a determination of the percentage of dirt and moisture, part 2 is secured to the sampling tube 8 extending through the walls 1G or the equivalent into the passing gas and the filtering shell 3 arranged thereon or in the shell 1, and the shell then positioned on part 2 as shown, the retaining member 7 locking the parts The gas entering the apparatus passes over a very small area of surface 18 which being perfectly smooth offers no obstacles to collect dust. v The gas passes through the filtering medium and dehydrating agent vand through the meter, the dirt remaining upon the filtering medium and the moisture in the dehydrating agent, the amount of gas passed through being indicated by the meter. The amount of dirt and moisture may then be determined in the usual manner, as for example, by weighing or by an equivalent method, and the percentages determined from the quantity of gas passed through as indicated by the meter. The filter or apparatus may be arranged in any position but ispreferably arranged as shown so that the heavy particles ofdust fall to the bottom or lower side of thefshell 3 and the lighter particles collect at the top or upper side, the action of gravity preventing a compact coating from forming on the upper surface so that the filter has less tendency to clog and become impervious to gas. For this reason larger samples of gas can be used in making quantitative determinations so that more-accurate results are obtained. It is obvious of course that where it is not desired to determine the moisture the dehydrating agent and receptacle therefor may be omitte If the gas to be filtered is more or less moist so that the filtering medium tends to clog, or if for any other reason it is desired to heat the filtering device, any suitable means may be provided for the purpose.I

This may be accomplished by surrounding the outer shell 3 with a heating medium, as for example, by a resistance coil or fthe equivalent. In the preferred construction shown, however, a suitable heating coil 18 is arranged within shell l and insulated therefrom by means of an insulator 22 such as mica or the equivalent. The coil may be of any suitable form or design. and arranged for direct or alternating current. As shown the shell l is provided with a removable end 20 through which the ends 19 of the coil extend, suitable insulation 2l or the equivalent being provided. This construction permits the removal of the coil when desired. The heat given out by the coil. in the construction shown may be controlled or varied-in any known way. Where the gas passing ithrough the apparatus is'explosive in its nature or liable to be affected by t-he coil, the coil may be arranged on the eX-- terior of the device (not so shown) and protected in any preferred way. Where the coil is not used on the interior of the device, or where it is not desired to have the same easily removable it is not necessary of course -to make the end 20 of the shell 1 removable. After sufficient gas has passed through the apparatus the shell l may be removed GQ and the filtering medium 3 treated as desii-ed. It should b-e particularly noted that the arrangement shown not only gives a very efficient device, but that the method of sealing the apparatus by making a washer of the filtering medium leaves a small area at the entrance end of the filtering medium absolutely clean and free from dust or dirt so that the filtering mdium may be handled `for use` without disturbing the residue contions may be made in the construction, arl rangement or combination of parts shown and described, or that the device or parts thereof may be used wherever found applicable Without departing from the spirit of myinvention, hence I do not wish to be understood as limiting myself to the construction, arrangement or combination of parts, or uses, shown, mentioned or described.

Whatv I` claim as new and desire to secure by Letters Patent is: v p

1. In an apparatus for determining dust in gases, the combination of a shell of suitable material, an outlet coupling threaded to the outlet end thereof, and the wall of said shell at the inlet endtapering outward-ly toward said inlet end, a shell havingl an annular surface 'tapered complementary to the taper of the first mentioned shell, abag of filtering material havingthe` inlet end thereof fitted between the tapered surfaces of the two shells whereby said bag at its inlet end will remain protected and clean for a considerable area, and a coupling member having a threaded engagement with. the first mentioned shell and an interlocking connection with the other shell, substantially as and for thepurpose described.

2. In an apparatus for determining dust in gases, the combination of an outer-'shell of suitable material provided with an inlet and outlet, a removable part for saidshell arranged to be positioned substantially within the shell at the inlet thereof, a cupshaped shell of filtering material arranged within said outer shell and spaced therefrom with the edge at the open end thereof arranged bet-Ween the inner face of said shell and the outer face of said removable part forming a washer therebetween, and.v

means'for-coupling said outer shell and removable part together without passing through the filtering shell.

In an apparatus .for determining dust in gases, the combination of an outer shell of suitable material provided with aninwardly tapering inlet and an outlet, a removable part for said shell With an opening therethrough, said part having its outer face corresponding in taper to said inlet and arranged to be positioned Wit-hin the shell at the inlet thereof, and a cup-shaped shell of filtering material arranged Within said'outer shell and spaced therefrom with theA edge at the open end thereof arranged between said shell and removable part, and means for securing the filtering shell in place comprising a shoulder on the removable member, and a coupling member having a flangeengaging over said shoulder and also having a threaded engagement With the outer shell, substantially as and for the purpose described.

4. In an apparatus for determining dust and moisture in gases, the combination of a metallic shell of suitable shape provided with an inlet and an outlet, an inner shell of filtering material open at one end arranged therein with the open end at said inlet and dchydrating means arranged at said outlet.

5. In an apparatus for determining dust and moisture in gases, the combination of a shell of suitable material, a filter medium arranged therein, means coperating with said shell for retaining said filter medium in` position, a receptacle arranged at said outlet provided with a dehydrating agent therein and means for indicating the quant-ity o gas passed therethrough.

(i. In an apparatus for determining dust in gases, the combination of a metallic shell of suitable shape provided with an inlet and outlet, an inner shell of filtering mate- `rial open at one end and arranged therein with the open end thereof at said inlet, and` means carried by the shell adjacent said filter for heating the device as desired.

7. In an apparatus foi"determining dust in gases, the combination of a'shell of suitabie material, a filtering medium arranged therein, means cooperating with said shell for retaining said filtering medium in position. and remo vable heating means.

S. In an apparatus for determining dust in gases, the combination of a shell of suitable material, a filtering medium arranged therein, and heating means arranged Within said shell.

9. In an apparatus for determining dust in gases, the combination of a shell of suitable material, an inner shell of filtering ma.-

terial arranged therein but spaced therefrom,rmeans forretaining said inner shell in position, and removable heating Vmeans arranged Within said space.

'10. In an apparatus for determining dust and moisture in gases, the combination of .a shell of suitable material, an inner shell of filtering material arranged therein but spaced therefrom, means for retaining said linner shell in position, a coil positioned Within said space, said outer shell arranged to permit the removal of the coil therefrom, and dehydrating means.

1l. Inan apparatus for determining dust and moisture in gases, the combination of a shell provided with an inlet and an outlet, an inner shell of ltering material open at one end arranged therein With the open end at said inlet and dehydrating means arranged at said outlet.

l2. In an apparat-us for determining dust and moisture in gases, the combination of a shell provided With an inlet and an outlet, an inner shell of filtering material open at one end arranged therein with the open end at said inlet and dehydrating means arranged at said outlet, a carrying member of the dehydrating means, and a nozzle adapted to be connected to either said dehydrating means, or the outlet end of the first mentioned shell. p

13. In an apparatus for determining dust in gases, the combination of a shell of suitable material, an inner shell of filtering material arranged therein but spaced therefrom, means for retaining said inner shell in position, a heater positioned Within said space and dehydrating means.

let. In an apparatus for determining dust in gases, the combination of a` shell of suitable material, an inner shell of filtering material arranged therein but spaced therefrom, and heating means arranged within said space.

15. In an apparatus for determining dustand moisture in gases, the combination of a shell of suitable material, dehydrating means connected to the shell in the path of the material through the shell, and a heating member arranged Within the shell in advance of said dehydrating means.

In testimony whereof, I. have hereunto signed my name in the presence of two subscribing witnesses. l

` LESLIE A. ToUZALiv.4

Witnesses: v

ROY W. HILL, CHARLES I. COBB. 

